| Phone: | 966-6407 | |
| Email: | jason.sadowski@usask.ca | |
| Personal Webpage: | http://www.jasonsadowski.ca | |
| Supervisor: | Dr. Kaori Tanaka |
For years it has been believed that the presence of a charge density wave (CDW) , with insulating behaviour, competes with superconductivity (SC), which leads to zero resistivity. However, in a recent experiment on the type-II superconductor NbSe2 by Kiss et al [1], they have found evidence that a CDW can in fact boost SC in an electron-phonon coupled system. It has been found that portions of the Fermi surface which contribute to the formation of a CDW show the strongest electron-phonon coupling in the SC state. In a subsequent scanning tunnelling spectroscopy (STS) measurement on NbSe2 by Guillamon et al [2] , the local tunnelling density of states (LDOS) has been found to have atomic- scale modulations, which reflect a sixfold anisotropy of the superconducting energy gap related to the CDW vectors in the reciprocal space. This was a surprising result also in the sense that it is generally considered that the LDOS is homogeneous on the atomic scale. The goal of the proposed research is to understand the interplay of CDW, SC, and non-trivial Fermi surface (FS) structure, and explain these intriguing experimental results on NbSe2 .
Presented at the Dept. of Physics and Engineering Physics Research Days as well as the College of Graduate Studies Poster Expo
Inhomogenous and Multiple-Band Superconductivity
Collaborated on the design and development of the poster
Vortex Structure in a Two-Band Superconductor
Conference Presentations
Second Prize from the Division of Condensed Matter and Materials Physics at the CAP 2010 Congress in Toronto
Nanoscale Inhomogeneity in a Superconductor
Presentation at the 2011 APS March Meeting in Dallas Texas
Interplay of Charge Density Waves and Superconductivity
Papers
Review paper written for PHYS 891: Topics in Photoelectron Spectroscopy
Superconductivity and PES Experiments